Architecture Intermediate
Database per Service¶
DatabaseMicroservicesData 3 min read
Why each microservice should have its own database and how to handle cross-service queries.
Principle¶
One service = one database. No schema sharing. Data isolation is key.
Advantages¶
- Independent development — schema changes don’t affect others
- Technology freedom — PostgreSQL, MongoDB, Redis
- Independent scaling
- Fault isolation
Cross-Service Queries¶
// API Composition
async function getOrderWithCustomer(orderId) {
const order = await orderService.getOrder(orderId);
const customer = await customerService.getCustomer(order.customerId);
return { ...order, customer };
}
Summary¶
Database per Service complicates queries but enables true independence. Handle reads via API Composition or CQRS.
Need Help with Implementation?¶
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